Pitman.



C. PEARSON.

PITMAN.

APPLICATION FILED MAR- 19. I914.

Patented May 15, 1917.

zns m, rnomumm. wuumcmu. a. c.

illdli'lhlD dTATEd ATENT FFTE CHARLES PEARSON, OF CHICAGO, ILLINOIS, ASSIGNOR TO INTERNATIONAL HARVESTER COMPANY OF NEW JERSEY, A CORPORATION OF NEW JERSEY.

PITMAN.

Specification of Letters Patent.

Patented May 15, 1917.

Application filed March 19, 1914. Serial No. 825,823.

To all whom it may concern Be it known that 1, CHARLES PEARSON, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Pitmen, of which the following is a full, clear, and exact specification.

My invention relates to pitman connections and comprises means whereby wear of the associated parts of the mechanism in operation is automatically compensated for and the parts at all times are held in proper engagement in a manner to insure the highest efiicieucy and greatest durability.

The object of the invention is to provide a simple, inexpensive and eficient mechanism for the purpose required. This object is attained by means of mechanism, one embodiment of which is illustrated in the accompanying drawings in connection with a mowing machine. In these drawings Figure 1 is a top plan view of a pitman connection having my invention embodied in its construction; and

Fig. 2 is a side elevation of the construction shown in Fig. 1.

Fig. 3 is a horizontal sectional view of the ball gripping mechanism.

Referring to the drawings, wherein the same reference numerals designate like parts throughout the several views, 1 represents a mowing machine knife, 2 the knife head having a spherical journal bearing member 3 integral therewith, and 4 represents one end of the body portion of a pitman, preferably made of wood and having resilient jaw members 5 and 6, having one end secured to the front and rear sides thereof, respectively, by means of rivets 7,

the opposite ends of the jaws being provided with cup-shaped bearing members adapted to receive the opposite sides of the spherical journal bearing member 3. 9 represents a transversely disposed clamping bolt received by openings in the jaws and including a head 10 preventing it from being pulled too far through the opening in the rear jaw 6, and an elongated shank ex tending through the opening in the opposite jaw 5. This member 9 has a longitudinally disposed bore 11 extending part way through the same, in which is housed a coiled spring 12, a cotter pin 13 extending through an enlarged opening 1 1 in the bolt 9, positioning the parts against loss or displacement. This pin also holds the bolt 9 in its projected position and prevents accidental rotation thereof due to the pressure of the cotter pin against the member ('5.

F or the purpose of automatically mow ing the aw members toward each other and to hold them inproper bearing engagement with the member 3, the shank of the clamping bolt 9 is provided with a longitudinally disposed oppositely tapered slot 15 through its outside or front end, beyond the jaw member 5, and a slid-able wedge member 16 is carried in this slot with its inclined face in engagement with one of the tapered surfaces of the slot. This member 16 is provided with a stubblewardly extending shank portion 17, having its free end pivotally connected at 18 to one end of a threaded toggle member 19, having its opposite end slidably' received by an opening in a pin 20, preferably extending between upstanding ears 21 on the members 5 and (3 and attached thereto by a cotter pin 22. 23 represents a compression spring carried by the member 19 and operative between the pin and adjusting nut 24 carried by the threaded member 19 to yieldingly resist a movement of said member in a direction to permit the aws 5 and 6 to move away from each other. 25 represents a forwardly projecting ear or ledge, preferably formed integral with the member 5, and underlying the breaking point of the toggle, as shown.

In operation, with the mechanism in the position shown in Figs. 1 and 2, the wedge is yieldingly pressed in a direction to close the jaws 5 and 6 by means of the spring 23, and the toggle connection is engaged with the ledge 25 in a manner to limit a downward swinging movement of the toggle member. After the jaws 5 and 6 have moved to a self-locking position, as shown, these jaws will be automatically closed by the spring-pressed wedge 16 to maintain a predetermined degree of pressure between the associated parts of the bearing members as they become worn during the operation of the machine. When it is desired to disconnect the parts; as, for instance, when putting in a new knife, or when it is clesired to replace a section, the toggle members may obviously be swung upward about their pivotal connections in such a manner as to release the wedge and permit the jaws 5 and 6 to separate and release them from engagement with the bearing member 3.

I11 this construction it is to be noted that the wear upon the parts is automatically taken up without making it necessary for the operator to adjust the latter. Further it is to be noted that, by reason of the location of the toggle and the ledge provided under the toggle, any accidental breaking of the latter by stones or the like is effectually prevented. Attention is also directed to'the fact that, when desired, the knife may be readily and quickly removed by simply breaking the toggle, and that when the knife is so removed the bolt and wedge are heldin position to be readily returned to their operative positions, the spring in the bolt holding the parts against loss and in suring the positioning of the bolt against troublesome rotary displacement, while the edge on the pitman supports the toggle. Attention is also directed to the fact that the bolt may be turned when desired to present a new tapered surface to the wedge.

I-Iaving shown a preferred embodiment of my invention, I do not wish that it be confined to the specific details of construction, as shown, as it is understood that changes may be made in such details without departing from its spirit.

\Vhat I claim as my invention, and desire to secure by Letters Patent, is:

1. In a pitman connection, a pitman having jaws, means for clamping said jaws together including a controlling member, and a toggle operatively connected between said pitman and said controlling member.

2. In a pitman connection, a pitman having jaws, means for clamping said jaws together including a controlling member, and a spring-pressed toggle mechanism operatively connected between said pitman and said controlling member.

3. In a pitman connection, a pitman having resilient jaws, a member carried thereon having a shouldered portion projecting through one of said jaws, a wedge engageable with said shouldered portion, and a toggle operatively connected between said pitman and wedge.

4. In a pitman connection, a pitman having resilient jaws, a slotted member projecting through said jaws, a wedge extending through the slot in said member and a toggle operatively connected between said pitman and wedge.

5. In a pitman connection, a pitman having resilient jaws, a slotted member carried by one of the same and projecting through the other thereof, a wedge extending through the slot in said member, and a toggle operatively connected between said pitman and said Wedge.

6. In combination, a pitman, a resilient jaw thereon, a member projecting therethrough having a shouldered portion, a wedge engageable with said portion, and a toggle between said pitman and wedge engageable with said pitman in locked position.

7. In a pitman connection, a pitman having resilient jaws, a slotted member projecting through said jaws, a wedge extending through the slot in said member, and a spring-pressed toggle operatively connected between said pitman and wedge.

8. In a pitman connection, a journal bearing member, resilient jaws engaging with said bearing member, a clamping member carried by said jaws, a slidable wedge engaging with said clamping member, and spring-pressed toggle mechanism controlling the operation of said wedge.

9. In a pitman connection, a pitman having jaws, one of which is resilient, a clamping member rotatably mounted on said j aws, a slidable wedge engaging with said clamping member, and a toggle mechanism controlling the operation of said wedge.

10. In a pitman connection, a pitman hav ing jaws, one of which is resilient, a clamping member carried by said jaws, a slidable wedge engageable with said clamping member, and a link pivoted to said wedge and to said pitman.

11. In a pitman connection, a pitman having jaws, one of which is resilient, a clamping member carried by said jaws, a slidable wedge engageable with said clamping member, and a springpressed link pivoted to said wedge and reciprocably mounted on said pitman.

12. In a pitman connection, a pitman having jaws, one of which is resilient, a clamp ing member rotatably mounted on one of said jaws having a slotted portion extending through the other, means normally retaining said member against rotation, a wedge engageable with said slotted portion, and a toggle controlling said wedge.

13. In a pitman connection, a journal bearing member, resilient jaws engaging with said bearing member, a reversible jaw clamping member having inclined bearing surfaces carried by one of said jaws and extending through the other jaw, and a springpressed slidable wedge engaging with said clamping member in a manner to normally close said jaws. v

1a. In a pitman connection, a pitman having resilient jaws, a slotted member projecting through said jaws, a wedge extending through the slot in said member, a toggle operatively connected between said pitman and wedge, and means carried on said pit-- man for preventing the accidental breaking of said toggle.

15. In a pitman connection, a pitma'nhaving resilient jaws, a jaw clamping member carried by one of said jaws and projecting through the other thereof, a wedge engageable with said member in a manner to close said jaws, a toggle operatively connected between said pitman and wedge, and means carried on said pitman for preventing the accidental breaking of said toggle.

16. In a pitman connection, a journal bearing member, resilient jaws engaging with said bearing member, a reversible jaw controlling member carried by said jaws, a slidable wedge engaging with said clamping member in a manner to normally close said jaws, and spring-pressed toggle mechanism controlling the operation of said wedge.

17. In a pitman connection, a pitman having resilient jaws, a bolt extending trans versely through said jaws, said bolt having a bore therein, a spring housed in said bore between said jaws, a pin extending transversely of said bolt at a point between said jaws normally pressed against one of the latter by said spring, and means acting on one end of said bolt to draw said jaws together.

18. In a pitman connection, a pitman having resilient jaws, a bolt extending transversely through said jaws and having a bore therein, a spring housed in said bore between said jaws, a pin extending through said bolt between said jaws positioning said spring and normally pressed thereby against one of said jaws, and means for pressing said jaws close together upon said bolt.

19. In a pitman connection, a journal bearing member, resilient jaws engaging with said bearing member, an adjustable jaw clamping member carried by said jaws, a slidable wedge engaging with said clamping member in a manner to normally close said jaws, said wedge having an extended shank portion, and a spring-pressed toggle member having one end pivotally connected with said shank and its opposite end slidably received by a part of the pitman.

20. In a pitman connection, a pitman having jaws, one of the same being resilient, a jaw clamping member carried. by one of said jaws and having a shouldered portion extending though the other, a wedge member engageable with said shouldered portion, and a link pivotally connected to said wedge and pitman and engageable with said pitman when disposed at an angle to said wedge.

21. In a pitman connection, a pitman having jaws, one of the same being resilient, a

jaw clamping member carried by one of said jaws and having a shouldered portion extending through the other, a wedge member engageable with said shouldered portion, and a spring-pressed link pivoted to said wedge member pivotally and reciprocably mounted on said pitman and engageable with said pitman in one of its positions.

22. In a pitman connection, a pitman having jaws, one of the same being resilient, a jaw clamping member carried by one of said jaws and having a shouldered portion extending through the other, a wedge member engageable with said shouldered portion, a link pivotally connected to said wedge and pivotally and reciprocably mounted on said pitman, a spring carried on said link, and means for adjusting the tension of said spring.

23. In a pitman connection, a ournal bearing member, resilient jaws engaging with said bearing member, an adjustable jaw clamping member carried by said jaws, a slidable wedge engaging with said clamping member in a manner to normally close said jaws, said wedge having an extended shank portion, a spring-pressed toggle member having one end pivotally connected with said shank and its opposite end slidably received by a part of the pitman, and means for limiting a swinging movement of said toggle member in one direction.

24. In a pitman connection, a substantially spherical bearing member, resilient coacting jaw members engaging with the opposite sides of said bearing member, a reversible transversely disposed clamping member having inclined bearing surfaces received by openings in said coacting jaw members and including a. member having a head portion engaging with one of said jaws and its opposite end provided with a slot, and a spring-pressed slidable wedge carried by the opposite jaw and slidable through the slot in said clamping member engaging with said part in a manner to normally hold said jaws in closed position.

25. In a pitman connection, a substantially spherical bearing member, resilient coacting jaw members engaging with the opposite sides of said bearing member, a transversely disposed clamping member received by openings in said. coacting jaw members and including a member having a head portion engaging with one of said jaws, and a longitudinally disposed oppositely tapered slot in its opposite end at a point beyond the remaining jaw, and a spring-pressed slidable wedge carried by said jaw and received by said slot in a manner to normally hold said j aws in a closed position.

26. In a pitman connection, a pitman having jaws thereon, one of which is resilient, a clamping member carried by one of said jaws having a shouldered portion extending through the other j aw, a wedge member engageable with said shouldered portion, a transversely disposed member journaled on said jaws, a spring-pressed toggle operatively connected to said wedge and having one member reciprocable through said transversely disposed member, and means on said pitman limiting the movement of said toggle.

27. In a pitman connection, a substantially spherical bearing member, resilient coacting jaw members engaging With the opposite sides of said bearing member, a transversely disposed two part clamping member received by openings in said coacting jaw members and including a member having a head portion engaging with one of said jaws andits opposite end provided with a longitudinally disposed slot, a springpressed slidable Wedge received by said slot, said Wedge having a shank portion, a toggle memher having one end pivotally connected with said shank and its opposite end slidably connected to a part of said jaw, and means carried by said jaw and operative to limit a swinging movementof said toggle member in one direction.

In testimony whereof I aifix my signature in the presence of two Witnesses.

CHARLES PEARSON. Witnesses R. W. \VARTON, RAY PATTISON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. G. 

